Introduction: For the internal structure of the brushed DC motor, this article organizes the moving picture data on the Internet for future mixed use of moving pictures.
关键词: DC , brushed motor
§ 01 Brushed DC Motor
See How does an Electric Motor work? DC Motor explained video on YouTube to explain the internal structure and working principle of brushed DC motor in detail using 3D animation. It is recorded here for later video remixing.
Below is a cut of all the animation in the first 3:30 of the clip. More highlights can refer to the original part of the video.
§ 02 DC motor structure
Today I saw a short video, using exquisite 3D animation, to illustrate the internal structure and working principle of a small DC motor. This should be the most professional introduction I have seen.
The main components of the motor are introduced below. DC motors grow like this, and there are other variants.
▲ 图2.1 直流有刷电机
The main function of a DC motor is to convert electrical energy into mechanical energy required for mechanical motion.
▲ 图2.2 直流电机用途1
It is usually used in toy cars, power tools, and even some fans for people to cool off.
▲ 图2.3 直流电机用途2
When you look at a motor, the first thing you see should be its protective metal casing, also known as the motor's stator.
▲ 图2.4 电机外壳、定子
There will be a shaft protruding from one end of the motor, which can fix gears, fan blades, and even some pulleys.
▲ 图2.5 电机输出转轴
On the other end of the motor is a plastic cover with two terminals on it. We can connect the motor power supply to these two terminals to drive the motor shaft to rotate.
▲ 图2.6 电机引线端子
If we open the motor casing, we can see the internal structure.
▲ 图2.7 电机内部结构
First we will see two permanent magnets,
▲ 图2.8 电机定子永磁铁
They make up the north and south poles of the internal magnetic field.
▲ 图2.9 电机定子永磁铁极性
The center of the motor runs through the center of the rotor is the main shaft of the motor, which transmits the rotational energy out of the motor and drives the load on the main shaft.
▲ 图2.10 电机转子转轴
A rotor is fixed on the main shaft,
▲ 图2.11 电机转子磁芯
The rotor consists of several iron pieces, which are laminated together. Each iron piece has three T-shaped cantilevers.
▲ 图2.12 电机转子磁铁片
Around the outside of these cantilevers are the rotor coils. Current from the power source flows through the coil. When the power supply current passes through the coil, an electromagnetic field is generated,
▲ 图2.13 电机转子线圈
By controlling the polarity and transition time of the current magnetic field, the rotating electromagnetic force can be generated.
▲ 图2.14 电机转子线圈
The ends of the coils are connected to the commutator ring inside the motor.
▲ 图2.15 电机换流环
The commutator ring is divided into three sections, which are insulated from each other and insulated from the main shaft. The commutator ring is fixed on the main shaft with the main shaft as the center.
▲ 图2.16 电机换流环复原
The three windings of the motor coil are respectively connected to the three commutators.
▲ 图2.17 电机换流环分成三段
The circuit is formed with the outside through the commutator.
▲ 图2.18 电机换流环分成三段
Connecting the rotor coils to the external terminals are the brushes on the back cover of the motor.
▲ 图2.19 电机电刷
The commutator ring is between the two brushes and forms a complete circuit with the outside through two different segments.
▲ 图2.20 电机电刷
The current flows through the upper brush through a motor terminal, then through a segment of the commutator ring, into the motor coil, and then through the opposite segment of the commutator ring to connect to the lower brush, and finally flows out of the motor through the other terminal of the motor.
▲ 图2.21 电机内部电路通道
This is an introduction to the internal structure of a brushed DC motor. Understanding these structures allows us to gain a better understanding of how motors work.
▲ 图2.22 电机结构介绍完毕
You can think about where you can find applications for DC motors and how would you use them?
▲ 图2.23 不同种类的电机
※ Summary ※
For the internal structure of the brushed DC motor, this article organizes the moving picture data on the Internet for future mixed use of moving pictures.
■ Links to related literature:
● Links to related charts:
- Figure 2.1 DC brush motor
- Figure 2.2 DC Motor Application 1
- Figure 2.3 DC Motor Application 2
- Figure 2.4 Motor shell and stator
- Figure 2.5 Motor output shaft
- Figure 2.6 Motor lead terminals
- Figure 2.7 Internal structure of the motor
- Figure 2.8 Motor stator permanent magnet
- Figure 2.9 Motor stator permanent magnet polarity
- Figure 2.10 Motor rotor shaft
- Figure 2.11 Motor rotor core
- Figure 2.12 Motor rotor magnets
- Figure 2.13 Motor rotor coil
- Figure 2.14 Motor rotor coil
- Figure 2.15 Motor commutator ring
- Figure 2.16 Recovery of motor commutator ring
- Figure 2.17 The motor commutator loop is divided into three sections
- Figure 2.18 The motor commutator loop is divided into three sections
- Figure 2.19 Motor brushes
- Figure 2.20 Motor brushes
- Figure 2.21 Motor internal circuit channel
- Figure 2.22 The introduction of the motor structure is completed